Any one put a OS 70 fs in one?...Or what engine would you use?.....Thanx JW

No one has an opinion as to what engine to use ? OS 52fs or 70fs Tell me witch one you would use ...Thanx JW

I have a friend who had a Saito 72 in one and it flew real well with the 72. I would think it would be underpowered (at least where I live 4000ft elevation) with the OS 52. You might check the weight of the OS70 against the Saito 72. I believe the Saito 72 might weigh less.

Thanx I'll do that ...I am leaning to the 70 also ...JW

I have the Kyosho Pitts with a new Saito .56....... works just fine. Lots of pulling power. Be careful with this plane though.....it tends to snap heavily to the left on take off. Be ready for it. Trust me on this one especially with other pilots on the flight line.
Sometimes it takes off straight ahead....but watch out for the left snap.

Thanx i'll be carefull....JW

Thanks everyone, I choose the os 70 fs ...thanx for all the info...JW